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          <td class="headerItem" width="20%">Date:</td>
          <td class="headerValue" width="20%">2010-01-23</td>
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          <td class="headerValue" width="20%">15</td>
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          <td class="headerValue" width="20%">0.0 %</td>
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      <td><pre class="source">
<span class="lineNum">       1 </span>                : //  (C) Copyright Gennadiy Rozental 2004-2008.
<span class="lineNum">       2 </span>                : //  Distributed under the Boost Software License, Version 1.0.
<span class="lineNum">       3 </span>                : //  (See accompanying file LICENSE_1_0.txt or copy at 
<span class="lineNum">       4 </span>                : //  http://www.boost.org/LICENSE_1_0.txt)
<span class="lineNum">       5 </span>                : 
<span class="lineNum">       6 </span>                : //  See http://www.boost.org/libs/test for the library home page.
<span class="lineNum">       7 </span>                : //
<span class="lineNum">       8 </span>                : //  File        : $RCSfile$
<span class="lineNum">       9 </span>                : //
<span class="lineNum">      10 </span>                : //  Version     : $Revision: 49312 $
<span class="lineNum">      11 </span>                : //
<span class="lineNum">      12 </span>                : //  Description : Input iterator facade 
<span class="lineNum">      13 </span>                : // ***************************************************************************
<span class="lineNum">      14 </span>                : 
<span class="lineNum">      15 </span>                : #ifndef BOOST_INPUT_ITERATOR_FACADE_HPP_071894GER
<span class="lineNum">      16 </span>                : #define BOOST_INPUT_ITERATOR_FACADE_HPP_071894GER
<span class="lineNum">      17 </span>                : 
<span class="lineNum">      18 </span>                : // Boost
<span class="lineNum">      19 </span>                : #include &lt;boost/iterator/iterator_facade.hpp&gt;
<span class="lineNum">      20 </span>                : 
<span class="lineNum">      21 </span>                : #include &lt;boost/test/detail/suppress_warnings.hpp&gt;
<span class="lineNum">      22 </span>                : 
<span class="lineNum">      23 </span>                : //____________________________________________________________________________//
<span class="lineNum">      24 </span>                : 
<span class="lineNum">      25 </span>                : namespace boost {
<span class="lineNum">      26 </span>                : 
<span class="lineNum">      27 </span>                : namespace unit_test {
<span class="lineNum">      28 </span>                : 
<span class="lineNum">      29 </span>                : // ************************************************************************** //
<span class="lineNum">      30 </span>                : // **************          input_iterator_core_access          ************** //
<span class="lineNum">      31 </span>                : // ************************************************************************** //
<span class="lineNum">      32 </span>                : 
<span class="lineNum">      33 </span>                : class input_iterator_core_access
<span class="lineNum">      34 </span>                : {
<span class="lineNum">      35 </span>                : #if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
<span class="lineNum">      36 </span>                : public:
<span class="lineNum">      37 </span>                : #else
<span class="lineNum">      38 </span>                :     template &lt;class I, class V, class R, class TC&gt; friend class input_iterator_facade;
<span class="lineNum">      39 </span>                : #endif
<span class="lineNum">      40 </span>                : 
<span class="lineNum">      41 </span>                :     template &lt;class Facade&gt;
<span class="lineNum">      42 </span><span class="lineNoCov">              0 :     static bool get( Facade&amp; f )</span>
<span class="lineNum">      43 </span>                :     {
<span class="lineNum">      44 </span><span class="lineNoCov">              0 :         return f.get();</span>
<span class="lineNum">      45 </span>                :     }
<span class="lineNum">      46 </span>                : 
<span class="lineNum">      47 </span>                : private:
<span class="lineNum">      48 </span>                :     // objects of this class are useless
<span class="lineNum">      49 </span>                :     input_iterator_core_access(); //undefined
<span class="lineNum">      50 </span>                : };
<span class="lineNum">      51 </span>                : 
<span class="lineNum">      52 </span>                : // ************************************************************************** //
<span class="lineNum">      53 </span>                : // **************            input_iterator_facade             ************** //
<span class="lineNum">      54 </span>                : // ************************************************************************** //
<span class="lineNum">      55 </span>                : 
<span class="lineNum">      56 </span>                : template&lt;typename Derived,
<span class="lineNum">      57 </span>                :          typename ValueType,
<span class="lineNum">      58 </span>                :          typename Reference = ValueType const&amp;,
<span class="lineNum">      59 </span>                :          typename Traversal = single_pass_traversal_tag&gt;
<span class="lineNum">      60 </span>                : class input_iterator_facade : public iterator_facade&lt;Derived,ValueType,Traversal,Reference&gt;
<span class="lineNum">      61 </span>                : {
<span class="lineNum">      62 </span>                : public:
<span class="lineNum">      63 </span>                :     // Constructor
<span class="lineNum">      64 </span><span class="lineNoCov">              0 :     input_iterator_facade() : m_valid( false ), m_value() {}</span>
<span class="lineNum">      65 </span>                : 
<span class="lineNum">      66 </span>                : protected: // provide access to the Derived
<span class="lineNum">      67 </span><span class="lineNoCov">              0 :     void                init()</span>
<span class="lineNum">      68 </span>                :     {
<span class="lineNum">      69 </span><span class="lineNoCov">              0 :         m_valid = true;</span>
<span class="lineNum">      70 </span><span class="lineNoCov">              0 :         increment();</span>
<span class="lineNum">      71 </span><span class="lineNoCov">              0 :     }</span>
<span class="lineNum">      72 </span>                : 
<span class="lineNum">      73 </span>                :     // Data members
<span class="lineNum">      74 </span>                :     mutable bool        m_valid;
<span class="lineNum">      75 </span>                :     ValueType           m_value;
<span class="lineNum">      76 </span>                : 
<span class="lineNum">      77 </span>                : private:
<span class="lineNum">      78 </span>                :     friend class boost::iterator_core_access;
<span class="lineNum">      79 </span>                : 
<span class="lineNum">      80 </span>                :     // iterator facade interface implementation
<span class="lineNum">      81 </span><span class="lineNoCov">              0 :     void                increment()</span>
<span class="lineNum">      82 </span>                :     {
<span class="lineNum">      83 </span>                :         // we make post-end incrementation indefinetly safe 
<span class="lineNum">      84 </span><span class="lineNoCov">              0 :         if( m_valid )</span>
<span class="lineNum">      85 </span><span class="lineNoCov">              0 :             m_valid = input_iterator_core_access::get( *static_cast&lt;Derived*&gt;(this) );</span>
<span class="lineNum">      86 </span><span class="lineNoCov">              0 :     }</span>
<span class="lineNum">      87 </span><span class="lineNoCov">              0 :     Reference           dereference() const</span>
<span class="lineNum">      88 </span>                :     {
<span class="lineNum">      89 </span><span class="lineNoCov">              0 :         return m_value;</span>
<span class="lineNum">      90 </span>                :     }
<span class="lineNum">      91 </span>                : 
<span class="lineNum">      92 </span>                :     // iterator facade interface implementation
<span class="lineNum">      93 </span><span class="lineNoCov">              0 :     bool                equal( input_iterator_facade const&amp; rhs ) const</span>
<span class="lineNum">      94 </span>                :     {
<span class="lineNum">      95 </span>                :         // two invalid iterator equals, inequal otherwise
<span class="lineNum">      96 </span><span class="lineNoCov">              0 :         return !m_valid &amp;&amp; !rhs.m_valid;</span>
<span class="lineNum">      97 </span>                :     }
<span class="lineNum">      98 </span>                : };
<span class="lineNum">      99 </span>                : 
<span class="lineNum">     100 </span>                : } // namespace unit_test
<span class="lineNum">     101 </span>                : 
<span class="lineNum">     102 </span>                : } // namespace boost
<span class="lineNum">     103 </span>                : 
<span class="lineNum">     104 </span>                : //____________________________________________________________________________//
<span class="lineNum">     105 </span>                : 
<span class="lineNum">     106 </span>                : #include &lt;boost/test/detail/enable_warnings.hpp&gt;
<span class="lineNum">     107 </span>                : 
<span class="lineNum">     108 </span>                : #endif // BOOST_INPUT_ITERATOR_FACADE_HPP_071894GER
<span class="lineNum">     109 </span>                : 
</pre>
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